Electric switch.



G. B. REISBACH.

ELECTRIC SWITCH.

APPLICATION FILED JUNE 1, 1909. 1,1 10,345. Patented Sept. 15, 1914.

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YHE .vonm; PETERS 120.. uoro-Lnmru/Asnlucrom D c G. B. REISBACH.

ELECTRIC SWITCH.

APPLICATION mum mm: 1, 1909.

1, 1 10,345. Patented Sept 15, 191 1 2 8HEETS-BHEET 2.

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'rn $TATESPATENT BEIGE.-

fGU STAVE B. REISBACH,JOF I'vULV-IAUKEE, VJISCONSIN, ASSIGNOR TO THE CUTLER MFG. OF MILWAUKEE, \VISCONSIII. A CQRPQEATION OF VTISCONSIN.

To all whom it may concern:

Be it known that I, GUsrAvn B. a: citizen .of the United States, residing at Milwaukee, in. the'coiuity of M lwaukee and of .Wiscensin, have inventedneiv and useful lmprovement's in iElebti-id Switches, f:.w-ln ch the follo v'ingis a full, clear, coneis e, ahd exact description, reference being had to the accompanying drawing, forming of this specification.

My ention relates to electric switches and morcilparticularly to. those of the drum One-ob jec't .of my invention is to provide aiswritch of simple and compact structure, having contacts thereonfor reversing the c ireiiit connections of an electric motor; and angauxiliary contact for controlling the conti'fiuitypf the motor circuit.

arrangegthe auxiliarycontact as to eliminate danger; of. arcingbetween the same and to' pro ride an auxiliary contact "of a coni struction 'adaptedto close one of two pure allel} circuits whereby limit switches may be'ii sedito stop the motor to prevent the operationfof tliefiiiechanism driven thereby beyond its limits of travel. v I

kOtheryob'jtaCts and advantages of niyinv ,e'iitio'n \vill be hereinafter clearly set forth. YIIi the accompanying drawings, I'hare sho wn one of the' forms which my inven tionnihy take. v i v Insaid drawingsFigure 1 is a front clevation of the reversing switch or drum con troller With-the co'i er removed; Fig. 2 is a transverse sectional 'view through the switch as seen on line 2- 3, Fig. 1; and is a. diagrammatic View showing one circuit arrangement for the switch as app d to Infthe embodiment of my invention illustrated, I provide an inclosing and supporting casing 2. preferably formed of two parts only, the back, top and bottom being formed in one piece, and the sides and front being formed in one piece. Ashaft 3 is arranged to extend vertically through said casing. being supported in suitable journals 4 and 5, formed in the top and bottom respectively of the casing. .The upper end of the shaft ise' tended beyond the top, to provide means to which a h andle, or other device, maybe I Application filed Ju ze l, 19?. Serial K01499 448.

:. "further object of my nvention is {to so :pr m lyur um pm] ELECTRIC SWITCH.

. Speci ficition of Letters Patent. Pate t d S t .1914

secured, by whichthe controller may, be operated.

Audrum preferably. formed 'ofgtvvo fsed tions (3 and 7. .is rigidly mountedgiipofn the shaft. The lower ends'pf the diifim seetions are secnred'by aisuitablegelampidg member S, fastened ,up on A or. :f qjlimdilntegrhl :jvitli the shaft; by meansof bolts. .9 .Yhichiieittend h ug s Clamp ng Ii ei tfindtli gh downwardly .eifteild ing 'lu gs on the drum 65, sections; Suitable: insulati;tig"='disksflljare interposed between" the olampingjiember the bolts 9 and thelugs 10 of e; tions to j effectually. the s'ec tions from'each otherfland from'gtlienshaft. "10

The nppei ends.of'the driim'sections ar secu red to'the'slia'f ajdi fierentm ziniir loin that already descrlbe foikthelowverqendsj Air insulating secured giearthe 'i i s o formed uponj's aid x p contacts '15 "are. arra gedupb h sectionsin thefmanribifhe einafteflsfet for Mounted within thfe casing and secured to the back thereof is, bf material 17, secured in P65115191? by hnysuitable means as screws 18."'.The .bas e 17 carries supports for eonts ct fitigiiSfiQO. These contact fingers are preferablylseenred to the supp0rts'19 by spring ar ms 21'..'f--'Tlie outer ends of the fingers 20 are arranged to engage certain of the -coil'thet s'jlfi on the drum sections, whereby electrichl circuits are established. The supports 19 are provided with binding posts 22 by which the various conductors may be secured in electrical :connection with the contact'fingers 20.

Secured to the upper portion of the insnlnting disk 12 is a member23. The inem-i her 23 .is preferably. formed with arms24c extending to opposite sid esof the shaft'3," and secured to the ldisk'12 in any preferred manner'as by screws'25.i"said member 23 is also provided with an'upwardly and outwardly inclined :portion 26 and a contact portion 27. "The contact portion 27 is 0f less length than the contacts 15, for a purf pose hereinafter s'et' fo'rth. Pairs of contact fingers 28 and 29; similar to the contacts 20, are secured upon the insulating base 17 at its upper end in alinement with the contact fingers 20, and said contacts are adapted to be engaged by the contact portion 27, which is made wide enough to engage both fingers 28 or 29. The member 23; has its contactportion 27 disposed a considerable distance from the drum contacts and separated therefrom by the in sulating forth.

In Fig. 3, I have shown a diagrammatic view f one circuit arrangement for my device'a-s applied to use. It will be underdisk fora purpose hereinafter set stood thatfin the structure shown in Figs.

I ndf'a th'esect'ion 6 and 7 of the drum act as "a conductor between the various, contacts secured thereon. Inthe diagrammatic view, however, I have illustrated the various contacts as being "connected by conductors. I have also shown'the use of limit switches and circuit controlling switches, the functions dfwh ic'hwill behereinafte r explained. I will use :[ei'ponents to distinguish the various contacts on -the drum as well as to distinguish thevarious contact fingers. The contacts on one section of the drum comprise two contacts and 15", and the contacts on the'oth'er section comprise contacts l5 and l5 f l In the structure provided for operating ja single motor, three contact fingei' s ",:210" and20 are provided upon one'side of the bais'efarid contact fingers 20, 20 and '20 .on t he other side. Above the drumj'sections, I' have provided contact fingersQSfljand 28* on one side of the base, and contact fingers 29i and 29.. on the other side thereof. The contact finger 20 is connected by conductor 32 to the series field 330i the inotoifthe series field being connected by conductor 34 to one terminal of an electromagnetically controlled main switch 35. The other terminal of the main switch 35 isconnected by conductor 36 to the pOsitive side of the line. The shunt field 37 of the motor is-connected to the conductor 32 and by conductor 88 to the negative side of. the line. The contact finger 20 is connected by conductor 39 to contact finger 20", and by conductor 40 to the armature 41 of the motor, the other terminal of the armature being connected by-conductor 42t0 .the contact. finger 20.

. Contact fingers 20 and 20' are connected by conductor .43. Contact finger 20 is connected by conductor 44 to the resistance sections of an automatic rheostat 45, the movable element of the rheostat being connected to the negative side of the line. Contact fingers 28 and 29 are connected by conductor 46, and contact finger 29 is connected by conductor 47 to one terminal of the winding of the main switch 35, the other terminal thereof being connected to con duetor 38. Contact fingers 28 and 29 are j will engage the contact fingers '20 and 20 respectively, and the contacts lfi nd' 15 will engage the contact "fingers 'QO RI Id '20 g respectively, thu'sfcohnecting the motor field and' armature in one relation. After these contactsare' engaged, the contact portion 27, wh'ich, as before mentioned, is of less length than the "drum contacts, will engage the contact fingers 28 and 28", thus completing the circuit of the winding of the main 'switch35 Theiniain switch will: close, completing the motor circuit from the positive line, by conductor '36, acrom main switch 35; by conductor 34 through the series field 33, by condiictor 32 tocon tact finger 20 coi'itacts1'15 and .15" ,'contact finger 20 conduc,torls'"43 andfjifi to iar'inature 41, and by conductor coii ftact finger QO", conductor 39,contacts1t) and 15, to contact finger 20", condiictor44 to and through the resistance sections'of the automatic rheostat and its movable element to the negative side of the line.

'When the main switch closes, 'tiidiirc'uit of the winding of the automaticrheostat'fi .is also closed from the positive line by Iconductor 3G. auxiliary contact 54, Contact?) through the winding to the negative side of the line. The rheostat will, therefore,

operate to remove the resistancefrom the motor circuit and bring the same up to normal speed. I

The motor will continue to operate u ntil the operator moves the controlling switch to its initial position, causing the deepergization of themain switch and the opening of the motor circuit, or .until one of the limit switches 50 or 51 is opened by the device operated as hereinafter more clearly set forth. Rotation of the drum in the opposite direction from initial position,-causes;

contacts 15 and 15 to engage contact gers 20 and 20 respectively, while the contacts 15 and 15 engage contact fingers 20? and 20 respectively. The contact portion 27 engages the contacts 29 and 29 and causes the main switch to close. This reverses the flow of current through the armature without changing the flow of current through the field, thus reversing themotor.

By utilizing a broad contact portion 27 i of the construction described, which engages a pair of contacts, when the drum is moved in either direction, I am enabled to use limit switches both of the parallel. circuits controlled by saidauxiliaiy contact, which will" be automatically opened by suitable mechanism 'attlie ends o fltravel of the devicef which may be operated-by, the n'i'otor; This is particul'a'rly desirable where th'econ troller is used in elevator'service,-for, when the elevator reaches ne" li'mito'f travel, one

of the limit switch is opened, thus opening "the circuit of the main" switch. The motor will thus be automatically stopped,

and it will' be impossible tooperate the con trolling switch to, close the main ,sw1tch except by movin'g fjit' in a direction to re verse the motor connections;

It will further be seen that the circuit arthermore, by placing the member 23-on thein'sulating disk-and forming the-same as" hereinbefore described, so that the contact portion 27 is a considerable distance from the drum sections, and separated therefrom by the insulating disk, there is no danger of arcing around said insulating disk between said auxiliary and reversing contacts.

I claim 1. In an electric switch, in combination, a member movable in opposite directions, reversing switch contacts thereon, an insulating disk mounted on said movable member, an auxiliary contact member secured on said insulating disk and arranged with its contact surface spaced from the insulating disk and said reversing switch contacts, said auxiliary contact member adapted to close one of two parallel circuits when said movable member is moved in either direction.

2. In an electric switch, in combination, a member movable in opposite directions, reversing switch contacts thereon, an insulating disk mounted on said movable member, an auxiliary contact member secured on said insulating disk and arranged with its contact surface spaced from the insulating disk and said reversing switch contacts, said auxiliary contact member adapted to close one of two parallel circuits after the reversing switch contacts have been operated,

3. In an electric switch, in combination, a frame, an insulating base in said frame, contact fingers arranged on said base, a drum rotatably mounted in said frame, having reversing switch contacts thereon, coopcrating with certain of said contact lingers to vary the circuit conections of a motor, an insulating disk at one end of said drum,

tit e-contact fingers."

an auxiliary contact member secured to said disk away from said drum and having its contact surface spaced from said disk, said auxiliary contact adapted to cooperate with certain of said contact fingers to close one of two parallel circuits after the reversing switchcontacts have'engaged their respec- '4'." In an 'electr'ic "switch, in combination, mil-nine, an insulating base in said frame, contact 'finge'rs arranged on said base, a shaft rotatably mounted in said frame, drum sections secured on said shaftfi-reversin'g switch contacts arranged onsai d drum sections and cooperating with certain "of said contact fingers for varying the c'ircuit connections of a motorfan insulating disk on said shaft adapted to support one end of said drum, an auxiliary contact member on said insulati'n'gdisk "away from said drum' and having its contact surface 'spa'ced from said disk, said auxiliary contact portion adapted to engage "certain of said contact fingers to complete one of two parallel'circuits after the motor connections have been made Y1,;..;. 'L vv= 1 raj 5. In an electric switch, in combination, a member movable in opposite directions, reversing switch contacts thereon, an insu lating disk mounted on said movable member, an auxiliary contact member secured on said insulating disk and arranged with its contact surface spaced from the insulating disk and said reversing switch contacts, said auxiliary contact being adapted to close one of two parallel circuits when moved in either direction.

6. In an electric switch, in combination, a member movable in opposite directions and having reversing switch contacts thereon, an insulating disk mounted on one end of said movable member, an auxiliary contact member secured on said disk away from said movable member and arranged with its contact surface spaced from the insulating disk, said auxiliary contact being arranged to engage and disengage its cotiperating contacts in inverse order to said rcversing switch contacts.

7. In an electric switch, in combination, a frame, a shaft rotatably mounted therein, drum sections mounted on said shaft and insulated therefrom and from each other, reversing switch contacts on said drum sections, an insulating disk arranged on said shaft at one end of said drum sections, an auxiliary contact member on said insulating disk and having its contact surface spaced from said disk and said drum sections, said contact surface being or". less length than said reversing switch contacts.

8. In a motor controlling device, in combination, a member movable in opposite directions, reversing switch contacts thereon, an auxiliary switch contact insulated from said movable member and said reversing switch contacts, said auxiliary switch contact adapted to close one of two parallel circuits after the reversing switch contacts have been operated and limit switches arranged in said parallel circuits,

-9. In a notor controlling device, in combination, a rotatable shaft, a dr um on said shaft. movable;in opposite Ijdirections and having reversing; switch; contacts thereon, an disk Ion" said shaft, an auxiliary contactmember on vsaid insulating disk, and having itscontact surface spaced from said disk, contact fingers arranged to beene by s i fe s t i s.v and u il ry switch contacts, said}v auxiliary switch contact adapted to engagea pair of contact fingers to close one of two parallel circuits after saidi reversing -lswitch contacts have engaged theirfr respective contact, fingers, and limit switchesarranged in said,. parallel circuits.

a. iiiotor controlling device, in combination,;a, rame,an insu1ating base in said frame, contact arranged on said Copies of this patent may be obtained for limit switches arranged in said parallel cir @cuits,

base, a shaft rotatably ,mounted in said gframe, a drum secured on said shaft, re,- versing switch contacts arranged on said ;drum and cooperating with certain of said contact fingers for varying the circuit congncctions of a motor, an insulating diskon @said shaft adapted. tosupport one end of Qsaid drum, an auxiliary contact member. 011 said insulating disk away from saiddr'un; and having its contact surface spaced froni :said disk, said auxiliary contact portion adapted to engage a pair of contact fingers to. complete one of two parallel circuits after the motor connections have been made, and

In witness whereof, I have hereunto, subscribed my name in the presenqeof two wit:

messes, GUSTAVE- B. RE-ISBAGH: 1 1

lVitnesses:

FRANK H- H BBARD.-

five. cents each, by addressing the Commissioner of g,tent

Washington, D. C, 

